function initialize() {

        var options = {
            componentRestrictions: {country: "uk"}
        };

        var input = document.getElementById('book1');
        new google.maps.places.Autocomplete(input, options);

        var input2 = document.getElementById('book2');
        new google.maps.places.Autocomplete(input2, options);

    }
    google.maps.event.addDomListener(window, 'load', initialize);